Grease-cup.



G. c. MARTENS. l

GREASE CUP. APPLIOATION FILED 1120.10, 190s.

PATENTBD FEB. 12, 1907.

UNITED sTaTIas PATENT armen..

A cHanLns c. MARTENS, or LoNG ISLAND CITY, NEW Yorin, AssIGNoR To Aio ' sure on the grease is removed and fthe opera# .the movement b hand of the cap upon the Athreaded top of the bottom part, thereby NATHAN MAN UEACTURING CO MPANY, OF NEW YORK, N.l Y.

eaeAsE-QUP. y

Specification of Letters Patent.

Patented Feb. 12, 1907.

Applicaan nea December Io, 1906. serial No. 347,159.

To all whom, tm/ay Concern:

Beit known that l, CHARLES C. MARTENS, a citizen of the United States, residing in As- Stateof New York, have invented certain new and useful Improvements in Grease-V Cups, of which the following is a full and clear description.k l Thegrease-cups to which my invention particularly refers are'known as compres sion grease-cups,` and consists 'of a stationary bottom part screwed into the part to be greased and of a top part or cap which contains the grease and -which is. internally threaded and screwed down by hand, asjthe occasion requires Ait, over the externally-v compressing the grease and pressing it out through the central bore o f the bottom part. When these grease-cups are applied to parts. which are subliect to strong vibration, 1t occurs frequent y that the top part of the grease-cup is rattled loose, whereby the pres'- tion rendered ineiicient.-v Frequently, also, the top is 'lost as a/result of,i tsfworking loose. r l 1 The object of my invention is to'remedy these defects, a result Which'I attain by providing the cup with a locking device or detent arrangement which, While permitting bottom part, Wil at the same time act automatically to hold and practicallylock 'the two parts in their adjusted positionso firmly as to`-nullify the edect of vibration. I am aware that'it has before bee?Y proposed to provide a greasecup with a device of this general kind. 1

,My' invention consists in an improved construction and arrangement of parts for this purpose Which can best be explained and un derstood by reference to the accompanying drawings, in which- Figure 1 is a vertical axialv section of a compression grease-cup embodying my invention in its preferred form. Fi, 2 is a lil-:e section o'the cover map of the cup detached. Fig. 3 is aA cross-section on line Fig. 1. Fig. 4 is a cross-section-*onesame line, but on enlargeafcale, of a portion of thecup to illis'trate clearly the construction and-inode'f operation the lock or detent between the cap and base of the cup.

i A is the base or stationary parto the vthreaded shank B, designed to be screwed into the part which is to be lubricated. The part A has?an',vergternallyfthreaded annular rim C and a"coredout portion D, terminating below-in a small boreor axial passage E 1 in the" shankB, through which the lubricant passes out ofthe c-up.

. d. K is the cover or cap which holds the lubricant.'` This cap is threaded internally to engage the externally-threaded rim C on .the base.' By rotating the cap by hand it may be moved upon,V the threaded rim C up or down, according to the direction of rotation.

To use the cup, therap K, being rst detached from the base, is filled with grease or other lubricantpand is then screwed on the rim C ofthe base. B rotating the cap in the proper direction it Wi l be screwed down upon the base, thus compressing the lubricant and forcing it out through the'duct E.

rI o neutralize or nullify the injurious el'ect of vibration upon the cup, I provide between the circumferential meeting faces .of the cap and base of the cup an automaticallybperating spring-yielding detent or lock arrangement or device Whichwhile yielding to permit the movement by hand of the cap upon the base, Will-at the same time automatically operate to lock or hold together the parts in their adjusted position with sufficient firmness to prevent the cap from jarring loose or being .dislodged by vibration.

The detent praper consists ci? yieldin blunt pin H on the base, which is adaptedy to engage one of a number of shallow pits, depressions, or grooves L formed in the opposed face of the can, the grooves or depressions, as seen in Fig. 4, having a V or equivalent cross-section which Will givc lodgment to the blunt point of thellonking pin or detent,.butea-tfthe same time will permit it to automatically recede and disengage itself therefrom when the cap is rotated by hand. The members L of the detent arrangement are in such number and so located that for anyvvniaLerial-traction of a revolution of the 'cap one ci the members L will be brought opposite to .the spring-acting datent-pin Il.

I ,frclcr, as shown, to mount the 'grin llv upon a curved sfring-arni on`the inner Wall ol: the eXternally-screw-tlireaded rim C, which arm is fastened at one end to the rim,

grease-cup` provided with an externally-- IOC about equal to the height of the rim C andv being formed in the interior vface of the wall of cap K` at about/ right angles with the thread therein. These grooves are arranged in superposed rows, the grooves in one row -being disposed in staggered position relatively to the grooves in the adjoining row and the lower ends of the grooves in the row above extending down slightly below the level of the upper ends o" the grooves-in the row below, so that at or before the time the cap has been screwed down far enough to carry one row of grooves beyond the detent the next row of grooves will be brougljit into position to meet the latter. Under this arrangement it will be seen that at almost any fraction of the revolution of the cover one or the other of the grooves will be brought opposite to the point of the detent-iin H. In additionl to thus serving as one member of the detent arrangement the grooves, if applied in proi er numbers, as indicated, also tend to catch and bind the lubricant and to prevent its running out or exuding between the cap and base under the effects of 'pres sure or heat as readily as it would were the grooves not present.

The length of the grooves L does not exceed the height ofthe screw-threaded rim C,

so that as the cap is screwed down on the base by the time the lower end of any groove passes down below the rim the upper end oi: that groove will have passed below the top of the rim, thus closing it againstthe escape of the lubricant. For the same reason the grooves in one. row do not communicate with the Ofrooves in the adjoiningrow or rows.

The operation of the detent device will be understood without detailed explanation. -The detent-pin II being spring-yielding will give way sul'iieiently to allow the cover to be readily rotated by hand upon the base. At a certain fraction of any revolution of the cover, depending upon the number and arrangement of the grooves L, one of these grooves will be brought opposite the detentpin and the point ofthe latter will snap into it, and thus lock the cover in plaeeurrtil it is again turned by hand to further compress the lubricant. The spring-pin I-I engagea thegroove with force .sucient to hold the cover so that vibration cannot dislodge it nor jar it loose. The detent being practically upon the circumference of the cup is in a position where it will act with the greatest eiiieiency, and itslocation between the cir,- eumferential meeting4 faces of the cap and base shields it and puts it well out ofthe way.

While I have shown and described the preferred embodiment of my invention,"I do not limit myself strictly thereto, inasmuch as obviously changes in the form of the velements and in the structural details may be made without departure from the nature'and spirit of my invention.

What I claim herein as new, and desire to secure by Letters Patent, is as follows:

1. In a grease-cup, a stationary base provided With an externally-tlu'eadedv rim, an internally-threaded cap screwing on said rim, a spring-acting detent-pin mounted upon the inside of the base, passing loosely through,

i' and protrudingslightly from, an opening in the rim on said base, there being depressions 1n ther interior circumferential screw-threaded face of the cap, the arrangement being such that rotary movement ofthe cap upon the base will bring one or another of said depressions opposite to the point of the springacting detent-pin, in position to be engaged thereby, substantially as and for the purposes hereinbefore set forth.

2. In a grease-cup and in combination with the base and the cap screwing on the base, a spring-yielding detent mounted ou and protruding laterally from the base and a series of superposed grooves formed Vin the meeting face of the cap, extending crosswise oi the CHARLES C. MARTENS.

Witnesses L. KAssANDER,

W. L. ABATE. 

